Question

7 How many bricks each 25cm long, 10cm wide and 7.5cm thick, will be required
for a wall 15m long, 2.5m high and 1.25m thick?
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Answer 1

volume of each brick = 25×10×7.5= 1875 cm cube

volume of wall = 1500×250×125 =46875000 cube

brick required = 46875000÷1875 = 25000 bricks